Active torsional vibration damper
AssigneeStahl International B.V.
InventorJanusz Walkowc
Life of this patent
Estimating the term…
Abstract
A resonance torsional vibration damping system includes a member having at least one node location along its length. An energy exchanging device, such as a fly wheel and eddy current brake, is operably connected to the member at a damping location that is a distance away from the at least one node location. The energy exchanging device is capable of imparting a plurality of successive torsional impulses to the member. A suitable sensor, such as an angular amplitude sensor or a torsional stress sensor, is utilized to detect the presence of a resonance torsional vibration in the member. A computer is in communication with the energy exchanging device and the sensor, and is capable of controlling the energy exchanging device.
Claims18
A resonance torsional vibration damping system comprising:
- a member having a length and at least one node location along said length;
- an energy exchanging device operably connected to said member at a damping location that is a distance away from said at least one node location, and being capable of exchanging energy with said member by imparting a plurality of successive torsional impulses to said member;
- means for detecting a resonance torsional vibration in said member;
- and
- a computer in communication with said energy exchanging device and said detecting means, and being capable of controlling said energy exchanging device.
A resonance torsional vibration damping system comprising:
- a member;
- means for detecting a resonance torsional vibration in said member;
- means for estimating time periods when said resonance torsional vibration is between peak angular amplitudes at a damping location;
- means for imparting a plurality of successive torsional impulses to said member at said damping location, wherein each of said torsional impulses being imparted over a portion of one of said time periods in a direction opposite to a twisting motion from said resonance torsional vibration;
- and
- means for sizing said torsional impulses to have sufficient energy to damp said resonance torsional vibration such that said peak angular amplitudes are maintained less than a threshold amplitude.
Dependencies are inferred from the claim text.